Drawing-press.



PATENTED SEPT. 22, 1903.v

or.. S; lslffnrm I, DRAWING PRESS.. Arrmommm zum AUG.,1.8J, m2,.

4 SHEETS-TSHEET 1.

' lo norm..

Snom/woz I Z am@ 63W Y Vf@ 1H: Nomus PL-rrns co. Pnoouwo.. Neumann, u cv 4 SHEETS-SHEET 2 PATENTBD SEPT. '22, 1903.

. m M z. u m wn ,6 .E G.. .E BGM. N... L u@ Ir SWK 0.Am Ru Dm r P A 1ro IODEL.

@VH1/fasen' @rm/ov @c me cams Ferias co. mcraurkol, Neumann D c .u PATENTBD SEPT. 2z, 1903. o. s. 1s-HER." DRAWIG PRESS. APPL'IUATION FILED AUG. 18, 1902.

4 SHEETS-SHEET 3.

l0 IODEL.

PATENTED SEPT. 22, 1903..

.0.s`.BBYER. DRAWING PRESS. APPLIOATIONFILED LUG. 18, 1902.

4 SHEETS-sum 4.

. no mmm..y

ivo. tedere.

j UNITED STATES atented September 242, 190g.

PATENT OFFICE.

OTTO S. BEYER, OF CARLSTADT, NEW JERSEY, ASSIGNOR TO E. W. BLISS COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF WEST VIR- GINIA.

DRAWING-PRESS.

SPECIFICATION forming part of Letters Patent No. 739,379, dated September 22, 1903.

Applicationriled August 18, 1902. Serial No. 120,042. (No model.)

To all whom. it may concern.: y

Beit known that I, OTT'OS BEYER, acitizen of the United States, 'residing at Carlstadt, in the countyof Bergen and State of New Jersey, have invented certain new and useful Improvements in Drawing-Presses, of which the following is a specification.

This invention relates to power-presses applicable wherever a plunger having a somero what long stroke coacts with a bed for supporting the work upon which the plungeropcrates. Such presses are commonly used for drawing deep sheet-metal cups or sheet-metal tubes or like articles, although applicable for i5 other purposes. As heretofore constructed such presses have commonly had a stationary bed and a plunger coating therewith and having a stroke somewhat in excess of twice the length of the object to be drawn or otherzo wise operated upon. For example, for drawing a shell or tube to a length of sixteen inches the stroke of the punch must exceed thirty-two inches and vto aiford proper clearance is ordinarily7 of as much as thirty-six z5 inches. In such presses the plunger commonly is given a slow working stroke and a somewhat more rapid return stroke, the working stroke being practically limited on ordinai-ily heavy work to a speed of four to AIive 3o feet per minute, while the upstroke is made 'at a speed of from seven to ten feet per minute. Such presses are slow in operation by reason of the long stroke of the punch, more than halt' of which is performed idly before the punch encounters the work and begins to operate upon it.

' My present invention aims to increase the speed of presses of this character, and to this end substitutes for the stationary ybied here- 40 tofore used a movable bed which upon having the blank placed in position upon the die rises rapidly to carry the work up to the punch or,1in other words, to enter the punch within the blank preparatory to the drawing operation. This movement takes place during the beginning of the downstroke of the punch and is completed so that the bed comes to rest and serves as a firm support for the blank just before the punch encounters 5o the latter and begins to draw it through the die. The bed remains stationary during the tionon the lines 4 4 in Fig. 3.

drawing movement andythen'rapidly descendswhilethepunchisascending. Thebed then remains stationary in its lowest position f for a time suiiicient to enable the operator to to feed on a new blank, the punch moving sufflciently higher than the` top of the blank to 4provide not only sufficient clearance, but also to give time enough to the operator to perform'the feeding-on operation. The'rising and falling movements ofthe'bed may be variously imparted to it; but preferably, since in presses of this'kind the punch-carrying plunger is commonly driven by a rack-andpinion movement reversed at each end of the stroke by a belt-shifter, the bed is driven by independent mechanism which is started and stopped by tappet devices or analogous means, so that the movement of the plunger shall control the movements of the bed so as to properly-time the latter with respect to the former.

vThe general nature of my invention being now understood, Iwill'proceed to describe in i detail one embodiment thereof with reference to the accompanying drawings, wherein- Fignre'l is a side elevation, partly in vertical section. Fig. 2 is a'front elevation. Fig.

3 isa sectional view corresponding to the lowerpart ofFig. l, showing the parts in a; different position. Fig. 4 is a vertical sec- Fig. 5 is a fragmentary view showing the parts atthe left in Fig. 3 in one position, and Fig. 6 is a f similar view showingnthe same parts in the opposite position. ing the relative movements of the punch and Fig-'7 is a diagram showbed. Fig. S is a fragmentary side elevation showing the addition to Fig. l of the tappet belt-shifting mechanism.

Referring to the drawings, let Adesignate an upright frame of any suitableA construction for properly supporting the working parts, this frame being shown as'comprising or plunger B carries the punch C, the shapej and dimensions of which vary according to the work to be done. The die D, with which This slide` the punch coacts, is mounted on a bed E, which is constructed as a slide to reciprocate vertically between the side frames A', which latter are formed with suitable slideways for properly guiding it.

The plunger B is shown as operated by a rack and pinion, a rack Z9 being carried on its rear face, which is engaged by a pinion c, fixed on a transverse shaft F. In the construction shown power is applied to drive the shaft F first in one'direction and then in the other by means of a suitable system of belts and shifting mechanism. A shaft Gr has fixed on it a pinion d, which drives a gear e, fixed on a shaft II, on which is fixed a pinion f, which meshes with a gear-wheel g on a shaft I, on which is fixed a pinion 71, meshing with a gear-wheel t', fixed on the pinion-shaft F. The pitch-lines of these several gears are shown in Fig. l.

The bed E is raised and lowered by any suitable mechanism, toggle joints being shown-that is to say, toggle-links J J are pivoted at their upper ends to the head E on pivot-pins jj, and the lower ends of these links are engaged by crank-studs c on crankarms K K, formed on shafts LL, which shafts are adapted to oscillate through a half-turn in order that in one extreme position their cranks K K shall be turned downwardly in line with the links, as indicated in Figs. 3 and 4, while in the opposite position they shall be turned upwardly in line with said links, as shown in Figs. l and 2.

For imparting the requisite half-turns to the shafts L L at proper times I provide a driving-shaft M, which may be driven from yany source of power, but is shown as driven from the shaft G by a belt l on fixed pulleys 'm m', but which may be thrown onto loose pulleys o o'. The shaft M is thus driven in one direction or the other, according to the direction in which the shaft G is turning, or

by throwing the belt onto the loose pulleys the shaft M is undriven to leave the bed E stationary. On the shaft M is fixed a pinion p, meshing with a gear p on a shaft N, on which is fixed a pinion q, which meshes with a large gearwheel P and which in turn drives alike gear-wheel P. The gears P and P' serve to turn the shafts L L and might be xed thereon, so as to communicate motion thereto directly; but for the reason hereinafter explained I prefer to mount them loosely on the shafts L L to cause them to drive these shafts through links, whereby to give a variable motion. On the inner face of each gear-wheel P P is a stud fr, which is connected by two links .s and t to the crankstud u on a crank-arm L', fixed on the shaft L. The links s t are jointed together by a pin s, which carries a roller t', which roller rolls in a cam-groove o, formed in a stationary cam-plate Q. The active portions of the cam-grooves o are concentric with the shafts L, so that the thrust transmitted by the studs 0' to the links .s-/is communicated to the crankstud a in the same manner as though a single link were interposed between the studs o' and u, and consequently the shafts L L are caused to turn coincidently with the gear- Wheels P P'. These concentric portions of the cam-grooves o continue for one hundred and eighty degrees or sufciently to cause the rotation of the gear-wheels P P to communicate a half-rotation to the shafts L L, so as to carry theircranks from the bottom deadcenter to the top dead-center, or vice versa, and thereby communicate the complete rising and falling movement to the bed. If the gear-wheels P P were driven by positively acting mechanism, so as to be started and stopped at precisely the correct time and Without lostv motion due to inertia caused by the starting and stopping of the parts connected with the bed, these gear-wheels might be tixedly attached to the shafts L L; but as these conditions are not practically attainable without serious disadvantages and as it is desirable to drive the bed-operating lnechanism through a belt and to start and stop it by a belt-shifter it is necessary to make provision for a varying amount of irregularity in the time occupied in starting and stopping the moving parts. Accordingly I provide for giving the gear-wheels P P an extra or excessive movement beyond the requisite one hundred and eighty degrees and for 'taking up this excessive movement, so that it shall not be communicated to the shafts L L. To this end the cam-groove o is provided with idle extensions or branch grooves r/ r2 at its opposite cnds, so that the movement of the wheel P or P' may not be communicated to the shaft L, but instead will be taken up by an idle travel of the roller into one or the otherof these extensions ofvz. In order that this idle travel may not affect the shaft L, the groove extensions o o2 are made concentric with the center of the crank-stud it when the latter is in either cxtreme positionthat is to say, the lower extension o is, as shown in the diagram Fig. concentric with the crank-stud u when the bed is lowered, while the extension@2 is, as shown in the diagram Fig. 6, concentric with the centerof `the crank-stud u when the bed is elevated. In Figs. 5 and 6 it'is apparent that the drivingstud r may move between the positions marked r' and r2 without impartingany motion to the shaft L, because this movement simply causes the roller 1f to travel in the slot extension c or o2, during Which the link t merely swings` around the center of the stud tt without displacing the latter. Hence the wheels P P' may be given any extra or idle movement beyond the one hundred and eightydegrees movement necessary to actuate the bed within the limit `imposed by the length of the groove exten- IOS) IIO

' riation due to slip of the belts or to the effect of variations in the tightness` of the belting upon the starting or stopping of the parts. It also in the case of a tappet-actuated beltshifter permits of some inaccuracy in the adjustment of the tappets and obviates the uecessity of anextremely nice adjustment.

The relative movements of the plunger and bed are indicated by the diagram Fig. 7,where the zigzag lines R R indicate the slow descending and more rapid ascending movements of the plunger, while the line S indi-l cates the movements ofthe bed. Starting at`1 the plunger is at top stroke while the bed has been resting in its lowermost position. At this instant the'bed-operating mechanism is set in motion and the bed ascends until the plunger has descended to the pointv 2, coming to rest in its uppermost position just before the punch encounters the die at 3, whereupon the bed remains at rest during the entire drawing operation, the duration of which is indicated by the arrow 4, and the depth of draw is indicated by the arrow 5. As soon as the plunger reaches the bottom of its stroke the direction of motion of its driving-shaft G is reversedand it begins to ascend according to the line R', while at the same instant-namely, point 6-the bed-driving mechanism is set in motion and the bed descends during the first portion of the ascent of the plunger and until the point 7, whereupon the bed remains down at rest during the remainderof the upstroke of the plunger (during which time the operator feeds on a new blank) and until the plunger has recommenced its downstroke, whereupon the bed again rises, and so on.. It will be observed that for a given depth of blank the stroke necessary for the punch is shortened by exactly the alnount of lift'imparted to the bed. Thus the press is made much more compact than any rack-and-pinion press heretofore made. It will be understood that the drawn blank is separated or stripped from the punch in any known manner-that is to say, either by delivering it out from the die,

Aso that it falls through the bed -before the latter descends, or, if preferred, by carryingit up on the punch and then stripping it therefrom, so thaty the operator removes it from above the die before replacing it with a new blank. Y.

Although the specific means for reversing the'mo'vement of the shaft G and of shifting the belt for driving the shaft M are not essential to my invention, will, to enable the application of my invention to be understood, brieiiy describe such mechanisms;

The main shaftvG'may bedriven from any suitable continuously-rotating shaft, las the' shaft ll in Fig. 2, the'conneetion being made through any suitablereverse drive mechanism, such as a pulley 12, carrying a direct belt 13 yand a cross-belt 14, either of which belts l ing gearing described -to ascend.

or the other as the clutch-carrying slide or plunger reaches the top or bottom of its stroke. For this purpose any suitable tappet mechanism may be provided. I have shown the slide B carrying two tappets 19 and 20, which are vertically adjustable in a slot 21. When the slide in ascending approaches the upper limit of its stroke, its tappet 19 strikes a rol-ler 22,`carried on au elbowlever 23, fixed' on a shaft 24, thereby tilting this lever to the position shown in Fig. 2, whereby movement is communicated to an arm 25, fixed on the opposite end of the shaft, Fig. 8, which carries at 'its lower end a pin 26, which enters aslot in a long lever 27, which is pivoted at 28, and the free lower end of which is provided with a slot engaging a pin 29 on' the slide 18, whereby to move the slide tothe position shown in Fig; 2.

punch-carrying slide B approaches the lower end of its stroke, its other tappet 2O strikes a dotted lines inFig'. 2 and displacing the slide 18, and consequently the belts,` tothe extreme position to the left, whereby the direct belt 13, which until this instant hasbeen i driving the shaft G, isrun off the fast pulley 1,5, and the cross-belt 14; is thrown ontothisV pulley, whereby the shaft G is driven in the contrary direction, and through the interventhe slide B is caused For shifting the'belt l, I provide a belt# l shifter 31, which may be aslide by which the belt may be thrown onto the fast pulleys m m or loose pulleys o o', and l provide suitj able tappet mechanism for operating this shifter. the slide B by means of brackets 53 53, in

which it is adjustable, as by being screw-` When the slideB dethreaded or otherwise. scends to nearly the bottom limit of its stroke,

I have shown atappet 32 carried by'y it strikes a lever-arm 33 von a shaft 34,i from w which projects an arm 35, which arms constitute a lever which is tiltedl upward from the position shownin Fig. 2, and in so doing the arm 35, which engages the collars" I on a rod 36, lifts this rod, and thereby communicates motion through a'bell-c'rank 37 to the belt-shifter 31, which it thereby throws to the left to carrythe belt onto the fast pnl-` f leys.

The belt is shifted at about the same instant that the'motion of the shaft Gis reversed, whereupon as 'the shaft G Iis turning in the direction for causing the punch to as` belt Z to cause the bed E to descend. When the 4bedreaches the limit-of its downward stroke, atappet projection 38, carried by'it,

4 13o I 'cend motion is communicated through'th'el strikes a pivoted cam 39, carried on the beltshifter slide 3l, and thereby the belt is thrown back onto the loose pulley, so that the movement of the bed is stopped by the time that the projection 38 has passed below the cam 39, and the bed then remains stationary during the remainder of the ascent of the punch. When the slide B nears the upper end of its stroke, any suitable tappet upon the slide engages in any suitable manner means for again throwing the belt-shifter 3l to carry the belt from the loose to the fast pulleys. For this purpose I have shown a vertically-adj ustable tappet 40, Fig. 2, which strikes the end of a lever 41, Fig. 8, the rearward arm of which on theropposite side of its fulcrum connects with a tappet-rod 42, which passes down at the rear of the machine, and when depressed by this movement its lower end strikes an arm 43 on the shaft 34 (which arm is a duplicate of the arm 33) and again oscillates this shaft exactly as did the tappet 32 in striking the arm 33, thereby through the arm 35, rod 36, and elbow-lever 37 the belt-shifter is again operated to throw the belt onto the fast pulleys, so that the bed is caused to rapidly ascend as the punch begins its descent.

' When the bed has ascended to its upper position, a tappet-dog44, carried by the bed, en-

counters an arm 45, fixed on the shaft 34, and rocks this shaft to the position shown in Fig. 2, thereby again moving the bed-shifter to throw the belt onto the loose pulleys.

With the type of drawing-press to which my invention is applied,as shown in the drawings, itis not customary to use a blank-holder. My invention, however, does not exclude the use of a blank-holder.

It must not be inferred from the particularity of detail with which I have described my invention that I am necessarily limited to the details set forth, as my invention may be greatly modified in matters of mechanical detail without departing from its essential features.

What I claim is-M l. In a drawing-press, the combination of a punch-operating plunger, a reversible driving mechanism for reciprocating it, means for mechanically reversing such mechanism at each movement of the punch, a die-supporting bed movable toward and from theplunger, and mechanism adapted to move said bed toward the plunger, hold it stationary during the draw, and retract it from the plunger after the draw. v

2. In a drawing-press, the combination of a punch-operating plunger, a reversible rackand-pinion mechanism for reciprocating it, a die-supporting bed movable toward and from the plunger, and mechanism adapted to move said bed toward the plunger, hold it stationary during the draw, and retract it from the plunger after the draw.

3. In a drawing-press, the combination of a punch-operating plunger, a reversible driving mechanism for reciprocating it, means for mechanically reversing such mechanism at each movement of the punch, a die-supporting bed movable toward and from the plunger, and mechanism driven from said reversible driving mechanism, and adapted to move said bed toward the plunger, hold it stationary during the draw, and retract it from the plunger after the draw. 4. In a drawing-press, the combination of a punch-operating plunger, a reversible driving mechanism for reciprocating it, a die-supporting bed movable toward and from the plunger, and tappet-controlled mechanism driven from said reversible driving mechanism, and adapted to move said bed toward the plunger, hold it stationary during the draw, and retract it from the plunger after the draw. 5. In a drawing-press, thecombination of a punch-operating plunger, a die-supporting bed movable toward andfrom the plunger, a reversible operatiugshaft geared to said plunger, means for reversing the rotation of said shaft at the end of each stroke of the plunger, mechanism for moving said bed, and means for connecting said mechanism to said operating-shaft to start the movements of the bed and disconnecting it therefrom to stop the bed.

(i. In a drawing-press, the combination of a punch-operating plunger, a die-supporting bed movable toward and from the plunger, a reversible operatingshaft geared to said plunger, means for reversing the rotation of said shaft at the end of each stroke of the plunger, mechanism for moving said bed driven from said operating-shaft, tappets controlled by the plunger for coupling said mechanism to said shaft to start the movement of the bed, and tappets controlled by the bed for uucoupling said mechanism from said shaft to stop the movements of the bed.

7. In a drawing-press for deep drawing, the combination with a punch-operating plunger having a stroke less than double the length ofthe maximum draw, of a die-supporting bed movable toward and from said plunger with astroke approximately equal to the maximum draw, and mechanism adapted to move said bed rapidly (relatively to the speed of the plunger) toward the plunger `to cause the punch to enter the blank, hold it stationary during the draw, and retract it from the plunger immediately after the draw, whereby the stroke of the plunger is shortened by an amount approximating the length of draw.

8. Inadrawing-press, the combination with a plunger, a movable member coacting therewith, and mechanism for driving said member liable to a variable movement beyond that necessary to produce the required movement of said member, of means interposed between such mechanism and said member for neutralizing such variable excessive movements, so that they are not communicated to the latter.

9. In a drawing-press, the combination with a plunger, a movable member coacting there- IOO IIO

IIS

with, a shaft adapted by a determined partial revolution to move said member from one of its positions to the other, and driving a variable movement beyond that necessary to produce the required movement ofl said shaft, of means for taking up such variable excessive movements without communicating xo them to saidV shaft. Y.

l0. In a drawing-press, the combination of a reciprocating punch-operating plunger, a die-supportin g bed, toggle mechanism adapted to raise and lower said bed comprising a I5 crank-shaft and togglelinks.connecting its cranks With the bed, a reversible driving mechanism adapted to com municate alternate half-revolutions to said shaft, said driving mechanism liable to a variable movement 2o beyond that necessary to produce said halfrevolutions of said shaft, and means for taking up such variable excessive movements, whereby to avoid communicating them to said shaft and thence to the bed.

25 1l. In a drawing-press, the combination of a reciprocating plunger, an intermittentlymovable bed, mechanism for moving said bed comprising an oscillating shaft connected to said bed, an oscillating part for driving said 3o shaft, said part being liable toa variable movement beyond that necessary to produce the required movement of saidv shaft, and

take-up mechanism for communicating the movement of said oscillating part to said shaft comprising a roller connected to said 435 parts respectively, and a guiding-groove for said roller having an active portion corresponding to vthe Amovement transmitted .to said shaft, and inactive portions in Awhich r said roller may travel idly during such vari- 4o able excessive movements.

12. In a drawing-press, the combination of a reciprocating plunger, an intermittentlyi movable bed, mechanism for moving said bed comprising an oscillating shaft connected to 45 said bed, an oscillating part for driving said shaft, and take-up mechanism for communieating the movement of said oscillating part to said shaft comprising links .connecting a stud on said part to an arm on said shaft, a 5o roller at the junction of said links, and a guiding-groove for said roller `having an ac tive portion concentric with said shaft, and inactive portions adapted to permit the roller f to play freely around the terminal positions 5' 5 of said arm. l

In Witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

OTTO S. BEYER.` Witnesses:

FRED. H. MOGAHVIE, ADEL W. JOHNSON. 

